<template>
    <div>
         <!-- 面包屑导航-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图-->
        <el-card>
            <el-alert title="添加商品信息" type="info" center :closable="false"></el-alert>
            <!-- 步骤条-->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品照片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px"
            label-position="top">
                <!-- tab标签-->
                <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave"
                @tab-click="tabClick">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                             <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps"
    @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item :label="item.attr_name" v-for="item in manyTabData"
                        :key="item.attr_id">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals"
                                :key="i"></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="attr_name" v-for="item in onlyTabData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload :headers="headersObj"
                        :action="uploadURL"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove" :on-success="handleSuccess"
                        list-type="picture">
                        <el-button size="small" type="primary">点击上传</el-button>
                        <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑组件-->
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <el-button type="primary" class="addBtn" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <!-- 图片预览-->
        <el-dialog
        title="图片预览"
        :visible.sync="picVisible"
        width="50%">
            <img :src="preUrl" alt="">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
    data () {
        return {
            activeIndex: '0',
            // 添加表单
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                // 商品所属的分类数组
                goods_cat: [],
                // 图片的数组
                pics: [],
                // 商品的详细描述
                goods_introduce: '',
                attrs: []
            },
            addFormRules: {
                goods_name: [
                    { required: true, message: '请输入商品名称', trigger: 'blur' }
                    ],
                goods_price: [
                    { required: true, message: '请输入商品价格', trigger: 'blur' }
                    ],
                goods_weight: [
                    { required: true, message: '请输入商品重量', trigger: 'blur' }
                    ],
                goods_number: [
                    { required: true, message: '请输入商品数量', trigger: 'blur' }
                    ],
                goods_cat: [
                    { required: true, message: '请输入商品分类', trigger: 'blur' }
                    ]
            },
            // 商品分类列表
            cateList: [],
            cateProps: {
                expandTrigger: 'hover',
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            // 动态参数
            manyTabData: [],
            // 静态属性
            onlyTabData: [],
            // 图片上传地址
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组件的header请求头对象
            headersObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            // 图片预览地址
            preUrl: '',
            // 图片预览对话框显示与隐藏
            picVisible: false
        }
    },
    created () {
        this.getCateList()
    },
    methods: {
        // 获取商品分类数据
        async getCateList () {
            const { data: res } = await this.$http.get('categories')
            if (res.meta.status !== 200) return this.$message.error('获取数据失败')
            this.$message.success('获取数据成功')
            this.cateList = res.data
            // console.log(this.cateList)
        },
        // 级联选择器选中变化触发的函数
        handleChange () {
            console.log(this.addForm.goods_cat)
            // 判断是否选中三级分类
            if (this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat = []
            }
        },
        // tab栏切换事件处理函数
        beforeTabLeave (activeName, oldActiveName) {
            if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请选择商品分类')
                // return false
            }
        },
        async tabClick () {
            // console.log(this.activeIndex)
            // 访问动态参数面板
            if (this.activeIndex === '1') {
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,
                { params: { sel: 'many' } })
                if (res.meta.status !== 200) return this.$message.error('获取动态参数失败')
                this.$message.success('获取动态参数成功')
                // console.log(this.manyTabData)
                res.data.forEach(item => {
                    return item.attr_vals.length === 0 ? [] : item.attr_id.split(' ')
                })
                this.manyTabData = res.data
            } else if (this.activeIndex === '2') {
                // 访问静态属性
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attribute`,
                { params: { sel: 'only' } })
                if (res.meta.status !== 200) return this.$message.error('获取静态数据失败')
                this.$message.success('获取静态数据成功')
                this.onlyTabData = res.data
                console.log(this.onlyTabData)
            }
        },
        // 处理图片预览
        handlePreview (file) {
            // console.log(file)
            this.preUrl = file.response.data.url
            this.picVisible = true
        },
        // 处理移除图片的操作
        handleRemove (file) {
            // 获取图片临时地址
            const filePath = file.response.data.tmp_path
            // 根据图片临时地址查找图片数组的索引
            const i = this.addForm.pics.findIndex(x => x.pic === filePath)
            // 根据图片的索引使用splice进行移除
            this.addForm.pics.splice(i, 1)
            // console.log(this.addForm.pics)
        },
        // 监听图片上传成功
        handleSuccess (response) {
            // console.log(response)
            // 拼接一个图片信息对象
            const picInfo = { pic: response.data.tmp_path }
            // 将信息保存到图片数组中
            this.addForm.pics.push(picInfo)
            // console.log(this.addForm)
        },
        // 添加商品
        add () {
            // console.log(this.addForm)
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) {
                    return this.$message.error('请填写必要的表单信息')
                }
                // 执行添加的业务逻辑
                // loadsh cloneDeep(obj)
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                // 处理动态参数
                this.manyTabData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals.join(' ')
                    }
                    this.addForm.attrs.push(newInfo)
                })
                // 处理静态属性
                this.onlyTabData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals
                    }
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs
                console.log(form)
                // 发起请求
                const { data: res } = await this.$http.post('goods', form)
                if (res.meta.status !== 201) {
                    return this.$message.error('添加商品失败')
                }
                this.$message.error('添加商品成功')
                this.$router.push('/goods')
            })
        }
    },
    computed: {
        cateId () {
            if (this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>

<style lang="less" scope>
    .el-step {
        margin-top: 8px
    }
    .el-step__title {
        font-size: 13px
    }
    .ql-editor {
        min-height: 300px
    }
    .addBtn {
        margin-top: 8px!important
    }
</style>
